Table 3.
Analysis of the variance (ANOVA) of the fitted second-order polynomial models.
| Coefficient | y 1 | y 2 | y 3 | y 4 | y 5 |
|---|---|---|---|---|---|
| b 0 | 42.45 a | 82.71 a | 73.77 a | 145.07 a | 40.37 a |
| b 1 | −0.31 | 2.09 | 7.68 a | 9.71 b | −0.20 |
| b 2 | 1.71 b | 2.56 c | 2.95 c | 7.76 b | 2.73 b |
| b 12 | 1.32 c | 1.67 | 1.36 | −0.96 | 0.37 |
| b 11 | −22.36 a | −43.72 a | −52.43 a | −64.15 a | −18.02 a |
| b 22 | −2.64 b | −4.57 c | −2.50 | −13.67 b | −1.54 |
| R2 | 0.995 | 0.992 | 0.994 | 0.985 | 0.978 |
| F-exp | 222.6 | 130.3 | 182.9 | 66.9 | 44.96 |
| Significance level (%) | 99.999 | 99.997 | 99.998 | 99.986 | 99.963 |
a Significant coefficient at the 99% confidence level. b Significant coefficient at the 95% confidence level. c Significant coefficient at the 90% confidence level.